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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Related Experiment Video

Updated: Jun 20, 2026

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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Published on: May 15, 2017

Quantitative optical tomography of sub-surface heterogeneities using spatially modulated structured light.

Soren D Konecky1, Amaan Mazhar, David Cuccia

  • 1Laser Microbeam and Medical Program (LAMMP), Beckman Laser Institute, University of California - Irvine, 1002 Health Sciences Road, Irvine, CA 92617, USA.

Optics Express
|August 19, 2009
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Summary

This study introduces a new wide-field imaging method for turbid media, enabling accurate 3D visualization of absorption contrast. The technique offers improved quantification and resolution compared to existing diffuse reflectance measurements.

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Area of Science:

  • Biomedical optics
  • Photonics
  • Image reconstruction

Background:

  • Turbid media imaging is crucial for various applications.
  • Existing methods like diffuse reflectance have limitations in accuracy and resolution.

Purpose of the Study:

  • To develop a novel wide-field method for 3D imaging of turbid media.
  • To achieve quantitative depth-resolved absorption contrast.
  • To improve accuracy and resolution over standard techniques.

Main Methods:

  • Projecting light patterns of varying spatial frequencies onto the sample.
  • Reconstructing images using a fast analytic inversion formula.
  • Applying a novel correction to the diffusion approximation for enhanced boundary accuracy.

Main Results:

  • Successfully obtained quantitative, depth-resolved 3D images of absorption contrast.
  • Demonstrated higher accuracy in optical absorption quantification.
  • Achieved higher resolution compared to standard diffuse reflectance measurements.

Conclusions:

  • The presented wide-field method is effective for 3D imaging of turbid media.
  • The novel correction improves the diffusion approximation's accuracy near boundaries.
  • This technique offers a significant advancement over conventional diffuse reflectance methods.